[ALSA] Fix hang-up at disconnection of usb-audio

[firefly-linux-kernel-4.4.55.git] / sound / usb / usbaudio.c

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index c82b01c7ad3ad9871f5fe619db8929fb596cbc51..67202b9eeb77c09bf4c3d10fb372c5582e92394c 100644 (file)
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -1469,7 +1469,8 @@ static int snd_usb_hw_free(struct snd_pcm_substream *substream)
        subs->cur_audiofmt = NULL;
        subs->cur_rate = 0;
        subs->period_bytes = 0;
-       release_substream_urbs(subs, 0);
+       if (!subs->stream->chip->shutdown)
+               release_substream_urbs(subs, 0);
        return snd_pcm_free_vmalloc_buffer(substream);
 }